Anaphylaxis: Anaphylaxis continues to be noted with codeine, one of several ingredients in promethazine HCl and codeine phosphate oral Resolution. Promethazine is metabolized via the liver to a number of inactive metabolites like sulfoxides of promethazine, N-demethylpromethazine as well as other glucuronides. Promethazine is well absorbed from the gastrointestinal tract. https://akorn-promethazine-codein57778.isblog.net/fascination-about-akorn-promethazine-codeine-49492738